Organic eletrolye solution including silane-based compound and lithium battery using the same
a technology of organic eletrolyte and lithium battery, which is applied in the direction of primary cells, non-aqueous electrolyte cells, electrochemical generators, etc., can solve the problems of consuming excess charges, unable to meet all conditions of single organic solvent, and inability to use traditional aqueous electrolyte, etc., to achieve the effect of not reducing the lithium ion conductivity
Inactive Publication Date: 2009-04-30
SAMSUNG SDI CO LTD
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- Abstract
- Description
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- Application Information
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Benefits of technology
[0010]Aspects of the present invention provide an organic electrolyte solution that blocks the direct contact of an anode active material and an electrolyte, without decreasing lithium ion conductivity.
[0011]Aspects of the present invention also provide a lithium battery including the electrolyte solution, which has improved cycle properties and life span.
Problems solved by technology
Conventional lithium batteries operate at a high driving voltage, such that a traditional aqueous electrolyte cannot be used, because the lithium anode reacts vigorously with the aqueous solution.
A single organic solvent satisfying all conditions is difficult to obtain, and therefore, a mixed solvent, including a high permittivity organic solvent and a low viscosity organic solvent, is used.
When a polar, non-aqueous carbonate solvent is used, the anode reacts with the electrolyte in the secondary lithium battery, consuming excess charges.
Once a rift is formed, the rift is enlarged during charge / discharge process, deteriorating the active materials.
As a result, an SEI, made only of polar solvent and lithium salt, cannot maintain its ideal function as previously described.
Consequently, an internal resistance of the anode increases, resulting in a decrease in the battery's capacity.
Method used
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example 1
Preparation of Electrolyte Solution
[0065]1 wt % of the compound of Formula 3a below, as an additive, and 1 M of LiClO4, as a lithium salt, were added to an organic solvent made of propylene carbonate, to prepare an organic electrolyte solution.
example 2
Preparation of Electrolyte Solution
[0066]3 wt % of the compound of Formula 3a above, as an additive, and 1M of LiClO4, as a lithium salt, were added to an organic solvent made of propylene carbonate, to prepare an organic electrolyte solution.
example 3
Preparation of Electrolyte Solution
[0067]5 wt % of the compound of Formula 3a above, as an additive, and 1M of LiClO4, as a lithium salt, were added to an organic solvent made of propylene carbonate, to prepare an organic electrolyte solution.
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Abstract
An organic electrolyte solution including: a lithium salt; an organic solvent including a high permittivity solvent and a low boiling solvent; and a silane-based compound represented by Formula 1 below:In Formula 1, m and n are each independently integers of from 1 to 30; and R1, R2, R3, R4, R5, R6, R7, and R8 are represented in the detailed description of the present invention. The organic electrolyte solution can be included in a lithium battery, so as to suppress the degradation of an electrolyte, and to improve cycle properties and life span of the battery.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of Korean Patent Application No. 2007-108439, filed on Oct. 26, 2007, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein in its entirety by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]Aspects of the present invention relate to an organic electrolyte solution including a silane-based compound, and a lithium battery using the same, and more particularly, to an organic electrolyte solution including a silane-based compound which can suppress the degradation of electrolytes, and a lithium battery using the organic electrolyte solution.[0004]2. Description of the Related Art[0005]As portable electronic devices, such as, video cameras, mobile phones, and notebook PCs become lighter and more functional;, much research is being conducted regarding batteries for these devices. Particularly, because secondary lithium batteries have an energy de...
Claims
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IPC IPC(8): H01M6/16C08G77/46H01M10/0567C08K3/22C08L83/04H01M10/052H01M10/0569
CPCH01M10/052H01M10/0567Y02E60/122H01M2300/0025H01M10/0569Y02E60/10H01M10/05H01M10/0525
InventorLEE, SEOK-SOOTROFIMOV, BORIS A.RYU, YOUNG-GYOONHWANG, SEUNG-SIKLEE, DONG-JOON
OwnerSAMSUNG SDI CO LTD